youtu.be/N-excOZwTsU Prime Newtons introduced Sarrus’ Rule clearly, and in this lesson I visually build on that idea to explain the determinant of a 3 by 3 matrix step by step using arrows and diagonal tracking. This video breaks down Sarrus’ Rule in a simple and visual way, making it easy to follow for students learning determinants for the first time or revising linear algebra concepts. By focusing on downward and upward diagonals, you will see exactly how the determinant of a 3 by 3 matrix is formed and how the formula connects to the visual method. This explanation is inspired by teaching styles used by Prime Newtons, with added clarity and structured visuals for better understanding. Note that Sarrus’ Rule works only for 3 by 3 matrices. MISTA-ANI TV by MISTA-HARNNY – Nath Educational Session